Well pump



` 50 plunger,- barrel an positioned within' the well tubing in such,

Patented Oct. 12, 1926.

UNITED STATES BEES E. LEMMON, OF LNG BEACH, CALIFORNIA.

WELT; PUMP.

Application filed October 28 1925. Serial No. 65,316. Y

This invention relates to well pumps and more particularly .to a well pump so constructed and assembled as' to enable the removal of the pum barrel, plunger and vallilfes by simply pul g the rods from' the In well pumps as heretofore constructed, particularly for use in the pumping of o1l and the likel from wells, it has been necessary,

in order toremove the pump from the well for the purpose of repair, lcleaning or replacement of parts, to remove from the well the tubing or fluidstring within which the. well pump was supported in order that the \5 plunger and pump barrel could be removed from the well. Many devices 'have been de- -veloped and patented for the/removal of the standing valve and workingv .valves and plunger from the wellA without removing the welltubing or Huid string, which devices for the most part have depended upon ar formy of latch operable by means lof manipulation of the well plunger and rods, wherebythe well plunger was latched to the standing valve to remove the same from the well tubing. These devices have ,been for the most part unsuccessful and have no t gone into any extensive use. The pumping of wells, and particularly oil wells which are subjected to the action of sand and water in addition to pumping oil, results in the sanding up of the pumps and the rapid wearing of the valves and separate parts of the pump. The cost of removing the well pump from the well, where the tubing is removed,

has been admittedly increased greatl over that which-mightv be accomplished y the removal of the entire pump 'assembly without the removal ofthe well tubing.; This l 40 will be obvious from the fact that the well tubing may be' and is in manyl cases 'upwards of 4iive thousand vfeet in length and of necessity must be removed'l in stands of' not eater thanl approximately eighty foot crew 'pf approximately four men are required to remove this well tubing;

It is therefore an object of this invention to provide a well ump which comprises a vvalve assembly which is amanner that'the entire plunger, barreland valve mechanismare removed from the well as an inte all part 'without the necessity of engths so that several hours of time of 'a Another object of this invention is to rovide an improved type of well pump w 'ch is flexible and which has a minimum amount of friction, which friction is entirely ab sorbed or taken up by a plurality of expan- .sion rings mounted between the plunger and barrel assembly so" that thel pump will operate f or a longer period of time without the necessity of removal from the lwell to replace the parts thereof. or to repair the same than is the case where`\the ordinary type of well pump now commonly employed is used.

Other objects and advantages of this invention will be apparent from the\following" detailed description of a preferred embodiment thereof as illustrated in the accompanying drawings, in which drawings Figure 1 is an end elevation partly in section of a well pum embodying this inven tion, illustrating t e same as in within a well tubing.

Figure 2 is a side elevation of a well pump embodying this invention, illustrating the same in position to beremoved as a unit structure from the well tubing shown in central section.

position Figurey 3, is a sectional side elevation thereof taken substantially on vthe line 3 3 of Figure 2.

Figure 4 isl a sectional side elevation thereof taken substantially on the line 4.--4

of Figure 2.

Figure 5 is a sectional end elevation taken substantially onthe line' 5-5 of Fi re 2.

In the preferred v"embodiment of this invention illustrated' in the accompanying drawings, 1 villustrates awell tubing or fluid string as commonlyeemloyed in wells for the recovery of oil and t e like. 2 indicates an anchor shoe 'secured to the lower end of the well tubing 1 ata `collar 3. The anchor shoe 2 is 'secured atits'lower end at a col# lar '44 to a continuationif of the well tubing 1 which extends furthrfinto the well and through which continuation 5 the oil or water vor gas or thecombination of oil, water Vor gas is conducted to the pump. The pump unit assembly which is mounted within the well tubing 1 com risges aoarrel 6 to the l block 9l to 'which the valve seat 10 j is removably securedjvand vupon which seat 10 a ball 11 seats and which ball 11 is maintained within the cage 7 by means of a pin 12. Screw-threaded to the lower end of the standing valve block 9 is a sleeve 13, which sleeve 13 has a lower section 14 of reduced exterior diameter adapted to t 'within the bore of the anchor shoe 2. The` shoe 2 is tapered outwardly at its upper end to form a tapered annular seat 15`into which the tapered section -16 of the sleeve 13. fits4 and seats. l

ln order to releasably anchor the barrel 6 in position within the well vtubing 1, the shoe 2 has an inwardly tapered annular recess 17 into which an expansion .ring 18 mounted within a circumferential recess 19 lits. The ring 18 has a complementary taperedv surface 20 whichl lits against the tapered surface of the recess 17 so that a latch is supported which latches the plunger in position within the tubing 1. The weight of the pump assembly is supported on the tapered seat 15. A plunger `21 is mounted to reciprocate within gthe barrel 6. .The plunger 21 is connected at a Icoupling 22 to the rods 23, which rods 23 may be of any desired or preferred construction as is well understood in the art. Secured to the upper end of the barrel 6 at the threads 24 is a4 mandrel sleeve 25 in which mandrel sleeve 25 a mandrel 26 is supported and which mandrel 26 is prevented from being withdrawn from the mandrel sleeve 25 by means of a mandrel collar 27. which is screwthreaded to the end of the mandrel in position to engage the lower end surface of the mandrel sleeve 25. The mandrel 26 is of increased externall diameter at the upper end section 28 thereof so as to provide a shoulder ,29 which will prevent the driving Aof the mandrel 26 through the mandrel sleeve 25. Mounted around this upper end section 28 is a packing ring 30, which packing ring 30 is of greater len th than the length of the end section 28 ot the mandrel 26, and which packing ring 30 is engaged at its upper end to the under-surface of the annular llange 31 formed at the upper end ofthe mandrel 26. K

The packing ring 30 is for the purpose of providing a fluid tight connection between the barrel 6 and the well tubing 1 at the upper end of the pump assembly to prevent oil, sand and water from Howing down rebaiee the well tubing l and so as to permit the packing to return from such expanded position when it is desired to remove the pump unit, assembly from the well. An expansion ring 32 is mounted within an annular recess 33 formed in the mandrel 26, which eXpansion ring 32 may be engaged either within the annular recess 34 or the annular recess 35, both of which annular recesses 34 and 35 are formedfwithin the mandrel sleeve 25.

ln order to manipulate the mandrel 28 so that the ring 32may be engaged eith/er with the annular recesses 34 or 35, the boss 36 of the coupling 22 is engaged against the upper end surfacey of the flange 31 ot the mandrel 26 sothat when the rods are dropped or exerted in this position, the mandrel 26 is driven downward so that the expansion ring 32 is engaged with the annular recess 34 as illustrated in Figure'4 and the mandrel 26 is driven downward and the ring 32 engages within the annular recess 35 in which position the lange 31 of the mandrel e26 will operate to bell the packing 30 outward' to en agement with the well tubing 1 as is illustrated in Figure 1. Secured to the upper end of the plunger 21 is a valve block 37 to which valve block 37 a cage 38 is screwthreaded. The cage 38 is secured to or formed integral with an extension of the ,rods 23. The upper shoulder 40 of the cage '38 is in position so that when the rods are elevated-within the well to a sufficient head,

the shoulder 40 will engage the mandrel 26 and may be 'operated to drive the mandrel 26 through thev mandrel sleeve 25 so that the ring 32 is .disengaged from' the recess 35 and is driven upward to such a position that the same will be engaged withinthe recess 34, in which position the packing 30 will be permitted to contract back into position as illustrated in Figure 4 so that the pump assembly may be withdrawn from the wellv which is accomplished by exerting a further strain upon the rods so that expansion ring 18 is contractedto permit the same to pass from within the tapered recess 17 to position 1 such as is illustrated in Figure 3 in which position the entire pump assembly may be withdrawn from the well without the removal of the well tubing 1.

A valve seat 41 is removablyy secured to the valve block 37and"the ball 39 is ada ted to seat thereon. The valve block 3 screw-threaded to a nipple 43, which ni ple 43 is at its opposite end screw-threade to a connecting member 44, which connecting member 44 is likewise screw-threaded Ato a second nipple 45, which nipple 45 is screwthreaded to the cage-46, which cage 46 lis.

screw-threaded to a third valve block 47 in A which a seat 48 is removably positioned and upon which seat 48 a ball 49 seats to provide the lower working valve. A pin. 50 maintains the ball 49 within the cage` and the respective valve l1,603,188 y y j 46. Mounted around the nipples 43 and member 44' 45 between the connectin locks 37 and l -46 vare expansion rin s 51, which expansion rings 51 are he d spaced by means of washers 52. The expanslon rings 51 are so mounted that they exert outward press'iure 'to' provide a liuidl type seal between the? plunger' 21 Yand the barrel 6.

The expansion rings 51 are preferably constructed of a fibrous ring 53 interlocked as against the'walls of the barrel 6.

'53 ares acers 56 which s acers are in the` nature o rings of metal an when assembled in 'Nposition form within 'the washers 53 a f pluralityof rigid pockets in whichthe ex-y at 54 at its ends and behind which fibrous rings 53 a `metallic expansion ring 55v vis :mounted (preferabl spring steel) which yieldably forces the brous rings 53 outward Interposed `between each pair of washers pansion rings 51 are mounted.

From' the foregoing, it vwill be apparent that I have provided a unit pump assembl which may easily be removed from the we l and from the well without the re-v tubin mova of the well tubing from the well' and which well pump is of a sim le construction l and is extremeiliv i S adaptable or the pur ose of umping o water and the "like om we s.

Having' fully described a-.preferred embodiment of this invention, it 1s to be under- 'stood that I- do not\wish to be limited to the exact Adetails 'herein set forth vwhich may obviously be varied without departing from the appended claims.,

I claim 1. In a well pum and the sleeve.

-3.-In 'a well pump, the combination of a pump barrel, a mandrel .sleeve secured to the pumpbarrel, a mandrel mounted on the sleeve, Jpacking means mounted on the mandrel, a split ring mounted on the mandrel, and a pair of spaced annular grooves formed in the said sleeve'. p

p .4. lIn a well pump, the combination of a 'pum barrel, a vmandrel sleeve secured to the' arrel, a mandrel mounted within the sleeve, packing means mounted between the mandr and the sleeve, means for drivin the mandrel through the sleeve, and cate means between the'mandrel'and the sleeve.

'Signed at Los Angeles, California, this 17th day of October, 1925.- I

' BEES H. LEMON.

the combination of .a barrel, a mandrel s eeve secured to the bar ltheA lspirit of my invention as set forth iny vdrel, and latch means between the mandrel 

